<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <style>
    section :nth-child(2) {
      color: red;
    }
    /* section div:nth-of-type(1) {
      color: red;
    } */
  </style>

  <body>
    <section>
      <p>aaa</p>
      <div>bbb</div>
      <div>ccc</div>
    </section>
  </body>
</html>
